linux-kernel - [PATCH resend] Update num_symtab, symtab and strtab right after setup of core_num_syms, core_symtab and core

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Date:	Tue, 28 Sep 2010 09:06:28 +0800
From:	Hu Tao <hutao@...fujitsu.com>
To:	lkml <linux-kernel@...r.kernel.org>
Cc:	Rusty Russell <rusty@...tcorp.com.au>, Tejun Heo <tj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Américo Wang <xiyou.wangcong@...il.com>
Subject: [PATCH resend] Update num_symtab, symtab and strtab right after
 setup of core_num_syms, core_symtab and core_strtab.

symtab/strtab refer to memory that will be vfreed when load_module() is
done. So update them early.

Signed-off-by: Hu Tao <hutao@...fujitsu.com>
---
 kernel/module.c |    9 ++++-----
 1 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/kernel/module.c b/kernel/module.c
index d0b5f8d..d5dc98b 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2029,6 +2029,10 @@ static void add_kallsyms(struct module *mod, const struct load_info *info)
 	for (*s = 0, i = 1; i < info->sechdrs[info->index.str].sh_size; ++i)
 		if (test_bit(i, info->strmap))
 			*++s = mod->strtab[i];
+
+	mod->num_symtab = mod->core_num_syms;
+	mod->symtab = mod->core_symtab;
+	mod->strtab = mod->core_strtab;
 }
 #else
 static inline void layout_symtab(struct module *mod, struct load_info *info)
@@ -2738,11 +2742,6 @@ SYSCALL_DEFINE3(init_module, void __user *, umod,
 	/* Drop initial reference. */
 	module_put(mod);
 	trim_init_extable(mod);
-#ifdef CONFIG_KALLSYMS
-	mod->num_symtab = mod->core_num_syms;
-	mod->symtab = mod->core_symtab;
-	mod->strtab = mod->core_strtab;
-#endif
 	module_free(mod, mod->module_init);
 	mod->module_init = NULL;
 	mod->init_size = 0;
-- 
1.7.3

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